Composition for roof and wall covering



TJNITED STATES PATENT OFFICE.

COMPOSITION FOR ROOF AND WALLOOYERING.

No Drawing.

To wllwhomz't may concern:

Be it known that we, THEODORE H. BROWN and HAUGHTON- BROWN, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Compositions for Roof and Wall Covering; and we do hereby'declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention provides a new composition which may .be very cheaply made and which is highly efficient when used as a roof covering or as an inner or outer wall covering or for similar purposes.

This improved composition is made from ashes (either coal or wood, mixed with fine cinders) asphalt (preferably gilsonite), vegetable fiber (waste broom straw) out into short lengths.

The proportions of these materials may be varied and will vary for different purposes, but I have made a material highly efiicient for external roof and wall covering by using approximately fifty per cent. of ashes, twenty-five per cent. of asphalt and twenty-five per cent. of vegetable fiber, the fiber being waste broom straws and the proportions stated, being in respect to bulk.

In making this composition, we first heat and melt the asphalt, then put ashes on top of the moltenv asphalt and. stir the same in while the asphalt is still at high temperature. Into the mixture thus produced, the cut or finely broken particles of the waste broom straw are thoroughly stirred in until quite evenly distributed throughout the mass.

It is important that the broom straw be stirred in after the ashes have been thoroughly saturated by the hot asphalt and the mass slightly cooled so that the broom straw will not be ignited or scorched or its fibers otherwise damaged.

When this commingled mass is thoroughly cooled, it will be quite hard but of such plastic nature that it may be given the desired form by the pressure of forming rollers. This material, after it has been applied or otherwise formed, will harden somewhat by drying but will always have such elastic character that it will adapt itself to shrinkage or expansion on plaster, concrete or lum- Specification of Letters Patent.

Patented Mar. 1, 1921.

Application filed April 19, 1920. Serial No. 374,868.

her, under varied conditions of moisture or temperature, and hence will not crack. The material is perfectly water proof, and almost fireproof and moreover is a good heat insu- 'lator.

The out waste broom straws not only increase the tensile strength of the material, but further increase its heat insulating qual- 1ty and makes the material lighter than it would be if the straws were omitted.

This material will adhere well to plaster, concrete, wood, metal, or almost any other substance, if applied thereto while hot and on dry surface.

The lengths into which the broom straws will be cut will depend somewhat on the nature of the article that is being made or the manner in which the material ;is to be applied. When the material or composition is to be applied with a trowel or is to be made, for example, in an imitation of shingles, the straws should be cut into short lengths, say from one-half to a quarter of an inch. But when the material is being pressed into sheets by use of rollers for example, the straws may vary from short lengths to lengths as much as several inches, say six or eight inches.

To adapt the material to be more easily spread on a surface, by use of a trowel, a little molasses may be advantageously added to the mixture above described.

It is important to note that all the main the trowel and in the form of sheets and also in the form of shingles, have been thoroughly demonstrated in practice.

-What we claim is:

1. A new compositional matter composed of ashes, fine cinders, asphalt and waste broom straw thoroughly commingled.

2. A new compositional matter comprising ashes, asphalt and vegetable fiber, the ashes in bulk being about equal to the combined bulk of the asphalt and fiber.

3. A new compositional matter comprising ashes, asphalt and vegetable fiber, the ashes in bulk being about equal to the combined bulk of the asphalt and fiber and a small amount of molasses.

4. A new compositional matter composed and approximately twenty-five per cent. of 10 of approximately fifty per cent. of ashes and. finely cut waste broom straws'or stalks thorfinecinders, twenty-five per cent. of asphalt oughly commingled, and a small amount of and approximately twenty-five per cent. of molasses.

5 finely cut waste broom straws or stalks thor- In testimony whereof we afix our signaoughlg commingled. tures.

5. new compositional matter composed a of approximately fifty per cent. of ashes and. THEODORE H. BROWN.

fine cinders, twenty-five per cent. of asphalt HAUGHTON BROWN. 

